Suicide is never not permitted in Islam

Suicide is never permitted in Islam, according to sheikh Ahmad Kutty. He answered this question on Islamonline.net:
Respected scholars, as-salamu `alaykum. I was wondering in certain situations, if one commits suicide without killing anyone else, can it still be considered jihad?

For instance, at Guantanamo Bay Detention center, some Muslim men killed themselves in order to bring public attention and political will to stop the injustices detainees face there.

So, let's say a young Muslim man hangs himself knowing that it will one day help stop future injustices committed against Muslims by his government and hopefully publicly expose injustices committed against him because of his religion, can that person be considered a martyr?

For Kutty's answer, see HERE.